Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
A poll has found that computer 'nerds' make the best lovers, with 82 percent of IT geeks claiming they put their partner's pleasure above their own.
464
When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
44
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
Couples' personalities converge over time to make partners more and more similar.
235
In Korea, if you do not receive any gift on Valentine's day then all the singles go to Korean restaurants and eat black noodles to celebrate (or mourn) their single status.
28
Erotomania is a type of delusion in which the person believes another person is in love with him/her.
38
One in five long-term love relationships began with one or both partners being involved with others.
177